Tractor portion



FIG. 1 is a right side view of a tractor portion showing our new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right rear perspective view thereof;

FIG. 5 is another right rear perspective view thereof;

FIG. 6 is a left rear perspective view thereof; and,

FIG. 7 is a top plan view thereof.

The broken line showings of FIGS. 3, 4, 5, 6 and 7 are environmental only and not part of the claimed design. 

The ornamental design for a tractor portion, as shown and described. 